Hyssop is one of the categories of hyssop, and hyssop is mainly divided into two kinds: Sichuan hyssop and Huai hyssop, which are different in terms of origin, traits and efficacy. 1. Origin: Sichuan hyssop is mainly produced in Sichuan Province, followed by Yunnan Province and Guizhou Province, etc. Huai hyssop is mainly produced in Jiaozuo area of Henan Province, which is one of the four major medicines. 2. Characteristics: Sichuan hyssop is generally long cylindrical, branched, about 0.5~3cm thick, with yellowish brown or grayish brown surface, 3~8 rings of heterotypic vascular bundles in the cross section, and the center xylem is not obvious; Huai hyssop is generally long and thin cylindrical, unbranched, about 0.2~1cm thick, 2~4 rings of heterotypic vascular bundles in the cross section, and the center xylem is obvious. 3. Efficacy: Both Sichuan hyssop and Huai hyssop have the efficacy of activating blood circulation and removing blood stasis (promoting blood circulation and eliminating blood stasis in the body), tonifying the liver and kidneys, and strengthening the tendons and bones, among which, Sichuan hyssop favors activating blood circulation and removing blood stasis, and also has the efficacy of inducing the blood to flow downward, while Huai hyssop favors tonifying the liver and kidneys. If there is any discomfort and medication is needed, please go to the hospital and use the medicine under the doctor’s guidance.